SUB221-C 2 x 21" Cardioid Subwoofer

The SUB221-C is a high power compact cardioid subwoofer cabinet designed to allow an high attenuation between front & rear faces. Equipped with two 21-inch ND drivers. One driver is placed in a front direct radiating position and a second in a rear sidefacing position to create a bandpass configuration.
This system is capable of accommodating up to 6'00W of power continuously. With a cut-off frequency of 30 Hz, the SUB221-C is made for applications where the reproduction of sub frequencies is important and where you have to minimize the rear emission in order to get an higher sound quality and avoid resonances and reflections. (cabinet close to walls or stage at the rear)

Key features 
  • High power handling
  • 2 x 21" low frequency driver
  • 30Hz cut-off frequency
  • Cardioid pattern
  • Optimal LF coupling

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Frequency response (1):  30Hz - 120Hz

Power handling:   2 x 1'500 W (AES) (4)

Maximum peak SPL (2):   140dB


Low frequency:   2 x 21" ND long excursion cone drivers, ferro fluid cooled

Nominal Impedance:   2 x 8 Ohms

Connectors:   2 x Neutrik Speakon NL4MP (wired in parallel)


Cabinet Size (WxHxD):   778 x 596 x 1'200 mm

Cabinet finish:   black epoxy painted

Rigging:   Optional

Protective grill:  Removable perforated 1,6mm steel, foam cover inside

Weight:   102Kg

Elements & Accessories 
  • AP44M20 SMPSU Audio Power Amplifier & DSP

(1) Frequency response: +/- 3dB, measured at 3 meters, on axis, half-space conditions -  MLSSA 1/3 octave

(2) Max peak SPL: Measured with music referred to 1 meter

(3) Crossover: Acoustical crossover frequency - at these frequency, transducers produce equal sound pressure level

(4) AES: Power handling is measured under AES standard conditions

(5) Power AMPS: Amplifier RMS output power per channel into 2 ohms, both channel driven